Double Free Affecting curl package, versions <7.79.0-r0


0.0
critical

Snyk CVSS

    Attack Complexity Low
    Confidentiality High
    Availability High

    Threat Intelligence

    EPSS 0.53% (77th percentile)
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NVD
9.1 critical
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Red Hat
9.1 critical

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  • Snyk ID SNYK-ALPINE316-CURL-2842011
  • published 15 Sep 2021
  • disclosed 23 Sep 2021

How to fix?

Upgrade Alpine:3.16 curl to version 7.79.0-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream curl package and not the curl package as distributed by Alpine. See How to fix? for Alpine:3.16 relevant fixed versions and status.

When sending data to an MQTT server, libcurl <= 7.73.0 and 7.78.0 could in some circumstances erroneously keep a pointer to an already freed memory area and both use that again in a subsequent call to send data and also free it again.